Musnad Ahmad 32:1313

'Abd al-Samad narrated to us, Shu'bah narrated to us, 'Ali ibn Zayd narrated to us, from Anas ibn Malik, who said: "If a female servant from the people of Medina—and she was a slave girl—would take the hand of the Messenger of Allah, may Allah bless him and grant him peace, he would not pull his hand away from her until she had taken him wherever she wished."